Preheat the oven to 350 degrees and line 2 baking trays with parchment paper.
In a large bowl, whisk together the flour, salt, baking powder, and baking soda. Set aside.
In a large mixing bowl, beat together the butter and sugar until light and fluffy, about 2 minutes.
Add in the egg, vanilla bean paste (or extract), and lemon zest, mixing slowly.
Slowly add in the dry ingredients until just combined.
In a small shallow bowl, mix together the sugar and 1/2 tbsp lemon zest with your fingers to release the lemon oils into the sugar.
Scoop out 2 tbsp sized ball of dough, roll them into a ball, and coat in the lemon sugar.
Place the cookie dough balls on the cookie sheet at least 3 inches apart and bake for 9-10 minutes. Allow to cool slightly before transferring to a cooling rack until full cooled.
In a small shallow bowl, melt the white chocolate chips at 30 second increments stirring in between until fully melted.
Carefully dip the bottoms of the cooled cookies into the while chocolate letting the excess drip off before placing back on the parchment paper lined baking sheets. Drizzle each cookie top with the remaining white chocolate and place a lemon wedge on top. I like to put a little more white chocolate under the lemon wedge to act like glue.
Transfer to the fridge for 5-10 minutes to fully set before enjoying!